Compilare: main.cpp: In function 'void add_to_list(const int&)': main.cpp:27:10: warning: variable 'r' set but not used [-Wunused-but-set-variable] nod* r=p; ^ main.cpp: In function 'void read()': main.cpp:68:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("take5.in", "r", stdin); ^ main.cpp:69:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &sum); ^ main.cpp:71:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ main.cpp:130:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("take5.out", "w", stdout); ^